(window.webpackJsonp=window.webpackJsonp||[]).push([[2729],{3137:function(t,e,s){"use strict";s.r(e);var n=s(31),a=Object(n.a)({},(function(){var t=this,e=t.$createElement,s=t._self._c||e;return s("ContentSlotsDistributor",{attrs:{"slot-key":t.$parent.slotKey}},[s("h1",{attrs:{id:"iot-programming-with-python-and-raspberry-pi"}},[s("a",{staticClass:"header-anchor",attrs:{href:"#iot-programming-with-python-and-raspberry-pi"}},[t._v("#")]),t._v(" IoT Programming with Python and Raspberry PI")]),t._v(" "),s("h2",{attrs:{id:"example-temperature-sensor"}},[s("a",{staticClass:"header-anchor",attrs:{href:"#example-temperature-sensor"}},[t._v("#")]),t._v(" Example - Temperature sensor")]),t._v(" "),s("p",[t._v("Interfacing of DS18B20 with Raspberry pi")]),t._v(" "),s("p",[s("strong",[t._v("Connection of DS18B20 with Raspberry pi")])]),t._v(" "),s("p",[s("a",{attrs:{href:"https://i.stack.imgur.com/OBA2X.png",target:"_blank",rel:"noopener noreferrer"}},[s("img",{attrs:{src:"https://i.stack.imgur.com/OBA2X.png",alt:"enter image description here"}}),s("OutboundLink")],1)]),t._v(" "),s("p",[t._v("You can see there are three terminal")]),t._v(" "),s("ol",[s("li",[t._v("Vcc")]),t._v(" "),s("li",[t._v("Gnd")]),t._v(" "),s("li",[t._v("Data (One wire protocol)")])]),t._v(" "),s("p",[s("a",{attrs:{href:"https://i.stack.imgur.com/dSFFQ.png",target:"_blank",rel:"noopener noreferrer"}},[s("img",{attrs:{src:"https://i.stack.imgur.com/dSFFQ.png",alt:"enter image description here"}}),s("OutboundLink")],1)]),t._v(" "),s("p",[s("strong",[t._v("R1 is 4.7k ohm resistance for pulling up the voltage level")])]),t._v(" "),s("ol",[s("li",[s("strong",[t._v("Vcc")]),t._v(" should be connected to any of the 5v or 3.3v pins of Raspberry pi (PIN : 01, 02, 04, 17).")]),t._v(" "),s("li",[s("strong",[t._v("Gnd")]),t._v(" should be connected to any of the Gnd pins of Raspberry pi (PIN : 06, 09, 14, 20, 25).")]),t._v(" "),s("li",[s("strong",[t._v("DATA")]),t._v(" should be connected to (PIN : 07)")])]),t._v(" "),s("p",[s("strong",[t._v("Enabling the one-wire interface from the RPi side")])]),t._v(" "),s("li",[t._v("\nLogin to Raspberry pi using putty or any other linux/unix terminal.\n")]),t._v(" "),s("li",[t._v("\nAfter login, open the /boot/config.txt file in your favourite browser.\nnano /boot/config.txt\n")]),t._v(" "),s("li",[t._v("\nNow add the this line `dtoverlay=w1–gpio` to the end of the file.\n")]),t._v(" "),s("li",[t._v("\nNow reboot the Raspberry pi `sudo reboot`.\n")]),t._v(" "),s("li",[t._v("\nLog in to Raspberry pi, and run `sudo modprobe g1-gpio`\n")]),t._v(" "),s("li",[t._v("\nThen run `sudo modprobe w1-therm`\n")]),t._v(" "),s("li",[t._v("\nNow go to the directory /sys/bus/w1/devices `cd /sys/bus/w1/devices`\n")]),t._v(" "),s("li",[t._v("\nNow you will found out a virtual directory created of your temperature sensor starting from 28-********.\n")]),t._v(" "),s("li",[t._v("\nGo to this directory `cd 28-********`\n")]),t._v(" "),s("li",[t._v("\nNow there is a file name **w1-slave**, This file contains the temperature and other information like CRC. `cat w1-slave`.\n")]),t._v(" "),s("p",[s("strong",[t._v("Now write a module in python to read the temperature")])]),t._v(" "),s("div",{staticClass:"language-py extra-class"},[s("pre",{pre:!0,attrs:{class:"language-py"}},[s("code",[s("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("import")]),t._v(" glob\n"),s("span",{pre:!0,attrs:{class:"token keyword"}},[t._v("import")]),t._v(" time\n\nRATE "),s("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" "),s("span",{pre:!0,attrs:{class:"token number"}},[t._v("30")]),t._v("\nsensor_dirs "),s("span",{pre:!0,attrs:{class:"token operator"}},[t._v("=")]),t._v(" glob"),s("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(".")]),t._v("glob"),s("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("(")]),s("span",{pre:!0,attrs:{class:"token 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